If you're not excited by the idea of being an early adopter 'now', then you should come back in three or four years and either tell us "Told you it'd never work!" or join what should, by then, be a much more stable and easier-to-use system. - GAIt is being worked on by smart people. -DamienBlack

My reject rate skyrocketed back to 10-20% using the 150mhz and 166mhz bitstreams. This happened on both of the x6500s I tried, so I'm not understanding the 1-2% reject rate I saw on the earlier post. Maybe it's pool dependent?

Just got done finally setting up my "mining rig".This way they're both in front of the highest-airflow parts of the fan. Of course I'll have to take it apart again when my better heatsinks arrive, but until then it seems to be working

My reject rate skyrocketed back to 10-20% using the 150mhz and 166mhz bitstreams. This happened on both of the x6500s I tried, so I'm not understanding the 1-2% reject rate I saw on the earlier post. Maybe it's pool dependent?

Same. I'm on eligius, for what it's worth.

Edit: Spoke too soon. The reject rate is higher, but not 20% high. More like 6-12%.

If there is something that will make Bitcoin succeed, it is growth of utility - greater quantity and variety of goods and services offered for BTC. If there is something that will make Bitcoin fail, it is the prevalence of users convinced that BTC is a magic box that will turn them into millionaires, and of the con-artists who have followed them here to devour them.

If you're still running the boards passive, it'll probably be a good idea to put on a fan to get adequate airflow over the heatsinks. If the board feels warm under the FPGA, it's probably not cooled enough.

so i have the same issue with the 155mhz bitstream, i dont think that i have a heat problemas more people have that issue with the ztexmerge-bitstream of X6500 i think there is a issue in the bitstream

Iv had about a 3 degree increase in temps from mine.. but other than that it seems all good. One of the chips has produced a lot of errors - but most were in the first few hours... so ill just keep an eye on it.

with the 166mhz i'm up at 19% reject rate and i'm on btcguild, I was sub 1% at 133mhz

you've at least got a fan blowing on your heatsinks, right?

If there is something that will make Bitcoin succeed, it is growth of utility - greater quantity and variety of goods and services offered for BTC. If there is something that will make Bitcoin fail, it is the prevalence of users convinced that BTC is a magic box that will turn them into millionaires, and of the con-artists who have followed them here to devour them.

..I have an 80mm fan for each board, blowing right ontop (not to the side as others seem to). When I measure the temp, I measure it using an IR thermometer on the back of the board - seems to be where most the heat on my setup...

A customer pointed out to me that he saw high rejects with the faster bitstreams, but most were rejected because they were duplicate submissions. Reducing the getwork interval got rid of this problem.

At 166 MH/s, the entire nonce range should be hashed in 25.9 seconds, so new work should be loaded before that. The default interval in the latest version on Github is 20 seconds, which should be perfect for this (better to always have fresh work then to sometimes have stale work because of a latency problem).

If you're having really high rejects, could you post the getwork interval that you're using?

A customer pointed out to me that he saw high rejects with the faster bitstreams, but most were rejected because they were duplicate submissions. Reducing the getwork interval got rid of this problem.

At 166 MH/s, the entire nonce range should be hashed in 25.9 seconds, so new work should be loaded before that. The default interval in the latest version on Github is 20 seconds, which should be perfect for this (better to always have fresh work then to sometimes have stale work because of a latency problem).

Ah, this is probably my problem. I think I was still running at 30 seconds (the last time I did a git pull was when the submission bugfix came in).

Edit: Yep, back at 2-4%.

If there is something that will make Bitcoin succeed, it is growth of utility - greater quantity and variety of goods and services offered for BTC. If there is something that will make Bitcoin fail, it is the prevalence of users convinced that BTC is a magic box that will turn them into millionaires, and of the con-artists who have followed them here to devour them.

Just got done finally setting up my "mining rig".This way they're both in front of the highest-airflow parts of the fan. Of course I'll have to take it apart again when my better heatsinks arrive, but until then it seems to be working